Bước 1: Import dữ liệu

library(readxl)
data_anova <- read_excel("test.xlsx", 
                         sheet = "anova-twoway", range = "D5:F53")
data_anova <- as.data.frame(data_anova)
data_anova$diet <- as.factor(data_anova$diet)
data_anova$time <- as.factor(data_anova$time)
data_anova -> my_data

my_data
   diet   time stability
1   NT1 10-min  89.17712
2   NT1 10-min  89.76035
3   NT1 10-min  89.56072
4   NT1  5-min  86.81088
5   NT1  5-min  87.28091
6   NT1  5-min  84.50821
7   NT2 10-min  88.51183
8   NT2 10-min  89.83705
9   NT2 10-min  89.02299
10  NT2  5-min  85.94260
11  NT2  5-min  86.53363
12  NT2  5-min  84.58238
13  NT3 10-min  90.92160
14  NT3 10-min  90.31614
15  NT3 10-min  86.30768
16  NT3  5-min  88.22052
17  NT3  5-min  87.87284
18  NT3  5-min  86.48140
19  NT4 10-min  91.13180
20  NT4 10-min  91.06331
21  NT4 10-min  90.97900
22  NT4  5-min  87.41313
23  NT4  5-min  87.79204
24  NT4  5-min  87.83304
25  NT5 10-min  90.33636
26  NT5 10-min  90.45067
27  NT5 10-min  90.97430
28  NT5  5-min  86.72079
29  NT5  5-min  87.59405
30  NT5  5-min  87.51170
31  NT6 10-min  90.73797
32  NT6 10-min  90.21814
33  NT6 10-min  90.40041
34  NT6  5-min  86.89038
35  NT6  5-min  86.45951
36  NT6  5-min  87.25631
37  NT7 10-min  90.87250
38  NT7 10-min  90.58467
39  NT7 10-min  90.56533
40  NT7  5-min  85.88389
41  NT7  5-min  86.83931
42  NT7  5-min  87.13404
43  NT8 10-min  90.83993
44  NT8 10-min  91.04827
45  NT8 10-min  90.10980
46  NT8  5-min  86.33665
47  NT8  5-min  86.20297
48  NT8  5-min  84.82913
# Bố trí thí nghiệm
table(data_anova$diet, data_anova$time)
     
      10-min 5-min
  NT1      3     3
  NT2      3     3
  NT3      3     3
  NT4      3     3
  NT5      3     3
  NT6      3     3
  NT7      3     3
  NT8      3     3